I'm working on the big project who has edmx file with lots of table. I want to update a table from DB. But when I update the edmx file, it also refresh the other tables from DB. How do I update single table?
View 4 RepliesI recently started explore MVC and just tried some samples around, i.e. MvcMusicStore.
As the sample DB in MvcMusicStore is quite small, I am wondering how should I design the edmx/entity for a bigger database, let say for an enterprise application, which has more than 20 tables as in AdventureWorks?
Thus, the question is should I include all in one edmx/entity or I should include multiple edmx/entities when I designing the model?
when i delete Table (Entity Set) from edmx file ... it deleted from design but when i'm trying to add that table again to edmx file it doesn't appear in added table and when i open edmx file by xml i found table and its relation still in edmx xml so how can i delete entity set (table) completely from db note : i don't want that solution ...i want another easy solution [URL]
View 2 RepliesI need to add a table to a .edmx file. Earlier I had added that table, say, Table A to the edmx file. Since keys were not set, I had to delete it. Then in order to bring back the altered Table A to the file, I right clicked the file and clicked the option 'Update Model from Database'. But I couldn't find the table I deleted from the edmx file. It is there in the database. how can I bring the table back to the edmx file.
View 1 RepliesI am building an application using Asp.Net 4.0 and Entity framework 4.
I have already created the model class (edmx) file using the Database-First method of the Entity framework.
Now I am almost nearning the end of the application. I have realised I need to add one more table to my database.
How do I add the newly created table to the model class (edmx) file.
If I again regenerate the model class, similar to what I did the first time i.e using the Database-First approach, will my current application be affected.
Will the already in use data like tables, relationships and views be affected in anyway.
Do I have to follow this approach everytime I need to add a new table to the entity model class.
My Question is can we extend one context to another in Entity Framework 4. Following is the problem background.
I am using EF4 for developing a Web-Application. My Web Application has 3 projects.
One project is for storing candidate CV information.
Another project is for storing customer information.
Final project is called CORE. this CORE contains a edmx file that should be extended by CV and CRM.
As an example email address table can be shared by both customer (CRM) and CV. To share one table with another, we should be able to extend one context (CV context) with other context (customer context). Could some one having experience using Entity Framework share your experience with me to find whether this is possible.
We have 3 edmx files in three class libraries:
Person class library(Core) with core.edmx-Basic details related to a person(name, email) CV Class library with CV.edmx wich have CV related data(Experiance,skills) Customer Relationship management system(CRM) which have customer data(sales data...)
Then we want to use core class library edmx file(Core.edmx) with cv.edmx (basically cv tables should be able to use tables from core tables) . Same way we want to use the core.edmx with CRM.edmx for the 3 rd project
I've got a single table, with project information and schedule information. To make the data easier to present, I created a tab control with two panels (a detailsview in each). The first tab is for project info, the second tab is for schedule info (again, all fields in the same table). The problem is, if i change info in both tabs, and then hit the update button, only the data from one tab is added to the table. I think this problem is simple to fix, and boils down to the way I have the page organized, but I can't quite figure it out.
I've boiled my code down to the following conceptualized structure:
[code]....
When you click the update button, you return to the listview, but with only the information from your current tab saved. How can I get it to update from both detailsviews?
net.3.5 linq 2 sql
if i need to update a single field in the db table - do i need to select all the row first?
can i say update myTable Field2 = x where field1=y?
dont know its look like too mach recourses
Order order =new ();
order.ID = 1; orderStatus = "test";
db.order.attach(order);
db.Refresh(RefreshMode.KeepCurrentValues, oOrder);
db.SubmitChanges();
well that delete all the other fields values
I have two tables in oracle ,
i want to update two table data in a single command...
I want to know how to Update / delete the table records in ASPNETDB.MDF in single update / delete query ?
View 1 RepliesIs there a way to manually update a single edmx entity to reflect a new column in a SQL db table? If yes, what would be the proper step- by-step procedure?
I prefer not to use the "update model from db" template because this will update all the tables and wipe out all the customizations and name changes I have already made in the EF objects. This seems a bit overkill for a single column change. I went down this route once, and I prefer not to do it again. I do not see any way to actually update a single table from the DB using VS2010 "update from db".
What I have tried to do so far is manually add a new scalar property to the appropriate entity using the edmx designer, and this seems to work OK, but I cannot seem to find a way to map the new property back to the db through the mapping window. Do I have to do this directly through the XML file? Also is this sufficient to ensure the new column is correctly reflected in the edmx, or are there other steps that need to be done?
I have looked at two of Microsoft's tutorials for MVC. In one tutorial they are creating a .edmx file to handle the Entity Framework in order to execute Linq queries. In another tutorial they made a class called "MusicStoreEntities.cs" here is the code:
using System.Data.Entity;
namespace MvcMusicStore.Models
{
public class MusicStoreEntities : DbContext
{
public DbSet<Album> Albums { get; set; }
public DbSet<Genre> Genres { get; set; }
public DbSet<Artist> Artists { get; set; }
public DbSet<Cart> Carts { get; set; }
public DbSet<Order> Orders { get; set; }
public DbSet<OrderDetail> OrderDetails { get; set; }
}
}
And the tutorial creates an instance of this class and starts doing Linq queries as well. What are the differences between these 2 methods? and how can I make DbSet objects in a .edmx file?
When I try to add a new stored procedure to an EDMX file, I try to get the column information for a complex type, I get the following error and can not register the stored procedure:
An exception of type Microsoft.SqlServer.Management.sdk.sfc.EnumeratorException occured while attempting to get column information. The Exception is:
ExecuteScalar requires an open and available connection. The connection's current state is closed. The inner exception caught was of type System.InvalidOperationException withthis message: Execute scalr required an open and ready connection.
I cann ot add the new stored procedure but everything compiles fine.
We are using entity framework and we have two projects with two different edmx files. We need to keep both tables in same database and we want to extend funtionalities of one project by the other one. Is there a way to extend edmx files or is there a better solution for this?
we have 3 edmx files in three class libraries.
1.person class library(Core) with core.edmx-Basic details related to a person(name,email ...)
2.CV Claas library with CV.edmx wich have CV related data(Experiance,skills... )
3.Customer Relationship management system(CRM) which have customer data(sales data...)
Then we want to use core class library edmx file(Core.edmx) with cv.edmx (basically cv tables should be able to use tables from core tables) . Same way we want to use the core.edmx with CRM.edmx for the 3 rd project
How can i delete tables or procedures from ADO.Net Entity Framework3.5 data model?
View 2 RepliesI want to see the meta data files of edmx. mean to say that i want to see the .csdl and ssdl file while using vs2008.
View 1 RepliesI have a web project with a data model defined in an edmx file. The connection string starts like this:
metadata=res://*/;
This has worked fine for a while. But somebody else working on the project created a dll that also uses the entity framework and added it to the bin folder. Now when I try to create my connection there is an error loading the metadata.
Aside from totally changing the way one or both of us is doing things, I wonder if the problem can be fixed if my connection string can be changed to only look for the metadata defined in my edmx file. The problem is, for the life of me I can't find the right syntax to do this. The metadata is embedded in the output assembly, so there are no physical metadata files to point to. How exactly should I specify the metadata location in the connection string?
I would like to make some changes to my EF4 edmx file without modifying the file itself, mainly so I don't loose all my changes if I regenerate the model from the database. I'm familiar with XSL and have seen references made to using it in conjunction with the edmx file. This sounds like a great solution, however I can't seem to find any documentation on how to actually set this up. Do you reference the style sheet from the edmx file or do you configure it to look at the template and then load the edmx file in somehow?
Clarification:
Specifically what I'm trying to do is modify the model so that several of the views act as tables with relations within the model, see here: http://blogs.msdn.com/b/alexj/archive/2009/09/01/tip-34-how-to-work-with-updatable-views.aspx
The issue I'll have in using that method is if I need to update the database and regenerate the model I'll have to go back and make all of those changes again, I was hoping there was a way to use xslt to make those changes to the views so they would not be removed when the model is regenerated.
I have a stroed procedure which is mapped in myEDMX file under EntityContainer >>Function Imports. When I add or remove a column from the stored procedure, I am not able to remove the old columns from the model. I right click on the stored procedure in Model browser and got to Edit Function Import. The return type is complex.
I select "get column information" and get the updated return fields but can not update the collection. It will work if I click on "Create New Complex Type" but it will generate a new name for the collection and the old collection is still in the mode. I even tried deleting and adding the stored procedures and can not get it to work. I can only edit the edmx.cs and the XML to remove it but there is got to be a better way.
I have huge excel files that I have to open from web browser. It takes several minutes to load huge file. Is it possible to open a single worksheet (single tab) at a time from excel file that contains many worksheets? I have to do this using C# / asp.net MVC
View 5 RepliesI need to browse excel file and update the neccessary tables based on some ID. It is basically updating employees in bulk.
View 7 Repliesi got a problem to update my database which i bounded to datagrid. The problem is, i want to update my database only by clicking one update button at the bottom.. when the user click it, all the fields will be updated to database.
View 3 RepliesI have 2 tables:
- Salesmen with Pk.SalesmenID
- Appointments with Fk.SalesmenID and busy(bit)
How can I check if every salesmen has at least one appointment
Am I on the right way with statement below, though I got syntax problems
[Code]....
I have three table in my database they are ...
1. Category
2. Forum
3. Topic
I need to above three table information into a single table ...
I want to update object via entity framework
For example I have to changed object:
Obj1
Obj2
I want to save change to the Obj1 Only
[code]....
I try to Save with ApplyPropertyChanges but the data didn't saved
How can I update object?